My site worked fine before installing the plugin and after I deactivated it my site went back to normal. In the meantime it somehow "turned on" a "display: none;" style for several jquery parts of my site. I even tried unchecking use javascript and it didnt help. Same with the jquery. It's a shame since I have mailchimp and can't find a plugin to use that doesn't require me to start a new mailing list with their service. :-(